CN1152460C - Electronic controller of under-voltage tripping device - Google Patents
Electronic controller of under-voltage tripping device Download PDFInfo
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- CN1152460C CN1152460C CNB02112972XA CN02112972A CN1152460C CN 1152460 C CN1152460 C CN 1152460C CN B02112972X A CNB02112972X A CN B02112972XA CN 02112972 A CN02112972 A CN 02112972A CN 1152460 C CN1152460 C CN 1152460C
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- voltage
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- electronic controller
- control circuit
- tripping device
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Abstract
The present invention relates to an electronic controller for an undervoltage tripping device, particularly to an electronic controller for an undervoltage tripping device of a circuit breaker. In a power distribution system, the electronic controller for an undervoltage tripping device can test network voltage in real time. An electromagnetic mechanism is attracted in a normal voltage state, and is released in an undervoltage state to cut off a circuit breaker, so that an electric network is controlled. The electronic controller for an undervoltage tripping device comprises a rectifying circuit connected with the electric network and a voltage sampling filter circuit, wherein the voltage sampling filter circuit is connected with a starting voltage testing circuit and a holding voltage testing circuit, the holding voltage testing circuit is connected with a holding control circuit, and the holding control circuit is connected with a starting control circuit and an electromagnetic actuating mechanism; a microswitch K is connected with the starting voltage testing circuit, the starting control circuit and the electromagnetic actuating mechanism. The electronic controller for an undervoltage tripping device has the advantages of high accuracy and high reliability for testing voltage.
Description
Technical field
The present invention relates to a kind of electronic-controlled installation of under-voltage release, the electronic-controlled installation of the under-voltage release that circuit breaker is commonly used particularly, in distribution system, can detect in real time line voltage, electromagnetic mechanism adhesive during normal voltage, electromagnetic mechanism discharges during under voltage, makes breaker open operation, realizes the control to electrical network.
Background technology
Required number of ampere turns required number of ampere turns when starting adhesive was much smaller when electromagnetic structure kept adhesive, utilize this principle, existing under-voltage release has generally all adopted two coil configuration, for reducing iron loss, general solenoid works in dc state, is 99255613.9 as the patent No., name is called in " under-voltage release " patent, switch S 1 and electromagnetic mechanism interlock, coil L1 than the coil L2 number of turn many and line footpath carefully, switch S 1 is a normally off during adhesive.Civil power becomes direct voltage by rectifying device, this moment, electromagnetic mechanism came adhesive, switch S 1 is a closure state, coil L1 all is applied on the coil L2 by the short circuit direct voltage, and the thick number of turn in coil L2 line footpath is few, and resistance is little, electric current is very big, number of ampere turns is very big, produces very big electromagnetic attraction and makes the electromagnetic mechanism adhesive, and the switch S 1 with the electromagnetic mechanism interlock after the adhesive disconnects, the coil L1 energising of connecting with coil L2 this moment, coil L1 line footpath is thin, and the number of turn is many, and resistance is big, electric current is little, number of ampere turns is little, and the adhesive of electromagnetic mechanism this moment makes electromagnetic mechanism keep attracting state with less number of ampere turns.This moment, coil heating was little, can work long hours because electric current is less.But there is following shortcoming in this device for under-voltage releasing equipment: the poor accuracy that detects voltage, carry on as before and adopt solenoid directly to detect voltage, because factors such as technology, operational environment, the magnitude of voltage of single each adhesive of under-voltage release and release is all different, the adhesive of every batch of under-voltage release is also different with the magnitude of voltage of release, under the situation that now electrical network is required to increase day by day, the under-voltage release that this operation voltage scope is very big obviously is incompatible the requirement; Poor reliability, because under-voltage release is generally directly got main circuit single-phase voltage (AC230V) or line voltage (AC400V), direct voltage peak value after the AC400V rectification will reach about DC560V, the resistance of actuating coil is little, electric current is big, the direct voltage that disjunction is so high, the breaking capacity that adds the current switch S1 of coil L2 must be very big, and the sensitive switch of general miniaturization obviously is not suitable for using, so switch S 1 must be that operating physical force is big, open apart from big switch, obviously increased the stroke and the counter-force of under-voltage release, loss must increase, and switch S is ablated by direct-current arc for more than 1 time, long-term use, poor reliability; Under low-voltage, might make coil burnout,, be lower than the pick-up voltage of this under-voltage release for a long time when voltage according to above-mentioned operation principle, solenoid can't adhesive, and coil L2 will work independently for a long time, because coil L2 resistance is little, electric current is big, and temperature rise may be too high and be burnt out coil.
Summary of the invention
The electronic-controlled installation that the purpose of this invention is to provide a kind of under-voltage release, the accuracy height of its detection voltage, reliability height.
A kind of electronic-controlled installation of under-voltage release, it comprises rectification circuit, be connected with the voltage sampling filter circuit with electrical network, the voltage sampling filter circuit is connected with the sustaining voltage testing circuit with the starting resistor testing circuit, the sustaining voltage testing circuit is connected with the retentive control circuit, the retentive control circuit is connected with electromagnetic actuator with the start-up control circuit, and sensitive switch K is connected with electromagnetic actuator with starting resistor testing circuit, start-up control circuit.
The present invention adopts electronic circuit to detect voltage, and discreteness is little, not influenced by mechanical processing technique, is not subjected to the influence of electromagnetic mechanism operational environment and state thereof, therefore detects the accuracy height of voltage.The switch control that control starts be electronic circuit, work in the little electric current of low pressure, can be with the very little sensitive switch of volume, easy for installation, because electric current is minimum, the life-span is near the mechanical endurance of sensitive switch, again because of adopting electronic circuit to detect voltage, have only when voltage surpasses pick-up voltage, actuating coil just can make the electronic switch conducting, can not make coil electricity when being lower than pick-up voltage, so can not work in low-voltage state, just can not burn coil yet, so the reliability height.
Accompanying drawing and drawing explanation
Fig. 1 is a block diagram of the present invention.
Fig. 2 is an electrical schematic diagram of the present invention.
Embodiment
Rectifier diode D1-D4 forms rectification circuit, becomes pulsating dc voltage after the rectification.Voltage sampling filtered electrical routing resistance 1, R2, R3, rectifier diode D5, voltage stabilizing didoe D6, capacitor C 1 are formed.Pulsating dc voltage after the rectification by resistance R 1, R2 dividing potential drop after voltage on the power taking resistance R2 be sampling voltage, this voltage becomes smooth dc voltage U behind rectifier diode D5, capacitor C 1, voltage stabilizing didoe D6, resistance R 3 smothing filterings.Voltage stabilizing didoe D7 forms the sustaining voltage testing circuit, and voltage stabilizing didoe D8 forms the starting resistor testing circuit, and direct voltage U carries out starting resistor by voltage stabilizing didoe D8 and detects, and voltage stabilizing didoe D7 carries out sustaining voltage and detects.The retentive control circuit is made up of resistance R 4, metal-oxide-semiconductor VT1, rectifier diode D9, and resistance R 4 is the control utmost point load resistance of metal-oxide-semiconductor VT1, and rectifier diode D9 is the electromagnetic actuator solenoid L1 of circuit breaker, the fly-wheel diode of L2.When voltage U was increased to above voltage stabilizing didoe D7 reverse-conducting voltage, voltage stabilizing didoe D7 conducting promoted metal-oxide-semiconductor VT1 conducting, made coil L1, the L2 energising of connect, and electric current I is less at this moment, and number of ampere turns IN is less, can not make the electromagnetic actuator adhesive.The start-up control circuit is made up of resistance R 5, metal-oxide-semiconductor VT2, rectifier diode D10, resistance R 5 is a metal-oxide-semiconductor VT2 control load resistance, rectifier diode D10 is the fly-wheel diode of electromagnetic actuator solenoid L1, L2, when voltage U continues to be increased to above voltage stabilizing didoe D8 reverse-conducting voltage, voltage stabilizing didoe D8 conducting, this moment, sensitive switch K was an on-state, so metal-oxide-semiconductor VT2 conducting, make coil L2 short circuit, coil L1 switches on separately, this moment, electric current I was bigger, and number of ampere turns IN is bigger, makes the electromagnetic actuator adhesive.Turn-off with the sensitive switch K that the electromagnetism machine is carried out the structure interlock this moment, cuts off metal-oxide-semiconductor VT2 control pole tension, and metal-oxide-semiconductor VT2 is ended, and coil L1, L2 recover the series connection energising, make electromagnetic actuator keep attracting state with less number of ampere turns IN.When being reduced to voltage stabilizing didoe D8 reverse-conducting voltage under the voltage U, voltage stabilizing didoe D8 ends, voltage U continues to drop to when being lower than voltage stabilizing didoe D7 reverse-conducting voltage, voltage stabilizing didoe D7 ends, metal-oxide-semiconductor VT1 ends, coil L1, L2 dead electricity, electromagnetic actuator discharges, and this moment, the sensitive switch K with the electromagnetic actuator interlock resetted.This moment, voltage stabilizing didoe D8 ended, can not make metal-oxide-semiconductor VT2 conducting after sensitive switch K resets, and also just can not make coil L1 energising again.
Because the break-make of start-up control circuit is controlled in the conversion of the sensitive switch K of employing of the present invention and electromagnetic actuator interlock, after occurring that electrical network is instantaneous and falling or glimmer, when voltage U is replied, in time make voltage stabilizing didoe D8, metal-oxide-semiconductor VT2 conducting, short-circuited coil L2, allow coil L1 switch on separately, make the electromagnetic actuation of electromagnetic actuator, thereby reach can be when the electrical network under voltage reliable disjunction main circuit, can just often reliably connect main circuit and keep the effect of less coil current at line voltage again.
Claims (2)
1, a kind of electronic-controlled installation of under-voltage release, it is characterized in that it comprises rectification circuit, be connected with the voltage sampling filter circuit with electrical network, the voltage sampling filter circuit is connected with the sustaining voltage testing circuit with the starting resistor testing circuit, the sustaining voltage testing circuit is connected with the retentive control circuit, the retentive control circuit is connected with electromagnetic actuator with the start-up control circuit, and sensitive switch K is connected with electromagnetic actuator with starting resistor testing circuit, start-up control circuit.
2, the electronic-controlled installation of under-voltage release according to claim 1 is characterized in that adopting the break-make of controlling the start-up control circuit with the conversion of the sensitive switch K of electromagnetic actuator interlock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02112972XA CN1152460C (en) | 2002-04-30 | 2002-04-30 | Electronic controller of under-voltage tripping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02112972XA CN1152460C (en) | 2002-04-30 | 2002-04-30 | Electronic controller of under-voltage tripping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1377113A CN1377113A (en) | 2002-10-30 |
| CN1152460C true CN1152460C (en) | 2004-06-02 |
Family
ID=4742366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB02112972XA Expired - Lifetime CN1152460C (en) | 2002-04-30 | 2002-04-30 | Electronic controller of under-voltage tripping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1152460C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610451A (en) * | 2012-03-26 | 2012-07-25 | 成都创图科技有限公司 | Tripping device of novel breaker for switch cabinet of transformer substation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859985A (en) * | 2010-05-18 | 2010-10-13 | 遵义长征电器开关设备有限责任公司 | Field bus type intellectualized low-voltage switch device |
-
2002
- 2002-04-30 CN CNB02112972XA patent/CN1152460C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610451A (en) * | 2012-03-26 | 2012-07-25 | 成都创图科技有限公司 | Tripping device of novel breaker for switch cabinet of transformer substation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1377113A (en) | 2002-10-30 |
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Granted publication date: 20040602 |
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| CX01 | Expiry of patent term |